diff --git a/usersystem.capnp b/usersystem.capnp
index 50cda33..f5754c4 100644
--- a/usersystem.capnp
+++ b/usersystem.capnp
@@ -21,6 +21,6 @@ struct UserSystem
     	getUserList @0 () -> ( user_list :List(User) );
 
     	addUser @1 (username :Text, password: Text) -> User;
-    	removeUser @2 User;
+    	removeUser @2 (user: User);
 	}
 }